Where is the magnetic field located in a current-carrying wire?

D. Only at the center of the wire

The condition for the validity of Ohm's law is that the ?

D. Temperature should remain constant

A. Voltage should be fluctuating

C. Current should be alternating

D. Temperature should remain constant

Current leads voltage in which circuit?

D. Both inductive and resistive circuits

Everyday Science · Physics in Everyday Life · page 8 of 62

Electricity & Magnetism MCQs with Answers

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Electricity & Magnetism MCQs (71–80)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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71.
Two capacitors of 8µF are connected in series, then the equivalent capacitance is ?
Correct Answer: A. 4 µF
One-liner
The equivalent capacitance of two 8µF capacitors connected in series is 4 µF.
72.
Where is the magnetic field located in a current-carrying wire?
Correct Answer: B. Outside the wire
One-liner
The magnetic field in a current-carrying wire is located outside the wire, forming concentric circles around it.
73.
Which of the following is a heat-sensitive resistor?
Correct Answer: B. Thermistor
One-liner
A thermistor is a type of resistor whose resistance varies significantly with temperature, making it a heat-sensitive resistor.
74.
What is the unit of electricity?
Correct Answer: C. Kilowatt-hour
One-liner
The unit of electricity (electrical energy) is the Kilowatt-hour.
75.
The condition for the validity of Ohm's law is that the ?
Correct Answer: D. Temperature should remain constant
One-liner
Ohm's law is valid only when the temperature should remain constant, as resistance changes with temperature.
76.
Which of the following is a non-magnetic material?
Correct Answer: C. Copper
One-liner
Copper is a non-magnetic material, meaning it is not attracted to a magnet.
77.
The unit of conductance is?
Correct Answer: C. Mho
One-liner
The unit of conductance is Mho (also called siemens in modern SI terminology).
78.
For the computation of electric flux, the surface should be _?
Correct Answer: D. Closed
One-liner
For the computation of electric flux, the surface should be closed.
79.
Past Paper MCQ
Who discovered the relationship between electricity and magnetism?
Correct Answer: C. Michael Faraday
One-liner
The relationship between electricity and magnetism was discovered by Michael Faraday, who demonstrated electromagnetic induction in 1831.
80.
Current leads voltage in which circuit?
Correct Answer: B. Capacitive circuit
One-liner
Current leads voltage in a capacitive circuit because the capacitor charges and discharges in response to voltage changes.

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Electricity & Magnetism MCQs with Answers

Electricity & Magnetism MCQs (71–80)

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